skl mainboards/dt: Move genx_dec settings into LPC device scope

Change-Id: Iecb4851bedb7c9ed7793763d80acbcbb068e8832
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83172
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Jonathon Hall <jonathon.hall@puri.sm>
Reviewed-by: Erik van den Bogaert <ebogaert@eltan.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Marvin Evers <marvin.n.evers@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/intel/kblrvp/variants/rvp7/overridetree.cb b/src/mainboard/intel/kblrvp/variants/rvp7/overridetree.cb
index 9e8c814..87bf0d8 100644
--- a/src/mainboard/intel/kblrvp/variants/rvp7/overridetree.cb
+++ b/src/mainboard/intel/kblrvp/variants/rvp7/overridetree.cb
@@ -10,9 +10,6 @@
 	register "deep_s5_enable_ac" = "1"
 	register "deep_s5_enable_dc" = "1"
 
-	# EC host command ranges are in 0x800-0x8ff & 0x200-0x20f
-	register "gen2_dec" = "0x000c0201"
-
 	# VR Settings Configuration for 4 Domains
 	#+----------------+-------+-------+-------+-------+
 	#| Domain/Setting |  SA   |  IA   | GTUS  |  GTS  |
@@ -164,6 +161,9 @@
 		device ref pcie_rp5	on  end
 		device ref pcie_rp6	on  end
 		device ref lpc_espi	on
+			# EC host command ranges are in 0x800-0x8ff & 0x200-0x20f
+			register "gen2_dec" = "0x000c0201"
+
 			chip drivers/pc80/tpm
 				device pnp 0c31.0 on end
 			end